What best describes the live migration of a virtual machine from one host to another?

A.	It requires shutting down the virtual machine before migration
B.	It requires that the I/O and CPU calls be quiesced to ensure that as the CPU and memory state of a VM is able to be transferred between hosts without interruption of services
C.	It requires that the filesystem of the virtual machine be migrated to the new host before the state can be
D.	The virtual machine will be unavailable for a few seconds while it is suspended, transferred and then reinstated